Apparatus and method for varying the timing of a control signal

Transmission apparatus for transmitting signals in electromagnetic radiation

• comprising
• a timer for cyclically issuing electrical pulses connected to an oscillator for porviding said electrical pulses to said oscillator within a predetermined time period wherein the time of inception and duration of the pulses is variable,
• a light sensitive component for varying in time the generation of an output voltage in proportion to the intensity of visible light incident on the light sensitive component,
• and means for applying said generated output voltage to said timer varying the triggering the issuance of said electrical pulses to said oscillator within said predetermined time period in accordance with said output voltage,
• a read-only-memory means for storing a code in binary, means associated with said oscillator for providing a train of clock pulses actuated by said electrical pulse and adapted to sequence a counter in said read-only-memory, said counter sequencing addresses of said memory for supplying said stored code in coded electrical signals modulated on a carrier frequency to read out the data stored in the addresses,
• an emitter for converting said coded electrical signals representing the binary information into coded electromagnetic radiation pulses representing the same binary information.

The method of providing variable timing in the transmission of electromagnetic radiation from an individually independent transmitter of electromagnetic radiation,

• said method comprising the steps of:
• generating the output voltage from a photosensitive circuit variable in time in proportion to the intensity of light incident on the photosensitive circuit,
• periodically triggering an electrical pulse from a pulse issuing timer within a predetermined time period with the output voltage of the photosensitive circuit through a connection between the photosensitive circuit and the timer
• actuating an oscillator with said electrical pulses,
• producing a train of clock from said oscillator,
• sequencing addresses in which a code in binary is stored in a read-only memory upon applying said train of clock pulses to said read-only memory to supply binary information in coded electrical signals,
• transmitting said coded electrical signals representing binary information to one or more emitting diodes,
• and converting said coded electrical signals representing the binary information into coded electromagnetic radiation pulses representing the said binary information.